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Sharing Status	Not Public

Provides areal extent to elevated structures as well as edge line definition.

One use is in ortho rectification for defining areas that may need to be inspected for accurate rectification.

Polygons defining elevated transportation structures: bridges, overpasses, highway ramps.

Primarily elevated roadway features, but also includes railway structures.

Layer Name	elev_trans_structure_area
Subject Category	Survey
Title	Elevated Transportation Structures
Feature Count	1166
Feature Type	Polygon
Next Update	Annually
Spatial reference	EPSG:2926
Control ID	741
Place Keywords	Pacific NW, Washington State, King County, WA
Theme Keywords	Transportation, Survey, Reference Grids
Supplemental Information	None

OBJECTID From ESRI	Description Internal feature number. Domain Sequential unique whole numbers that are automatically generated.
SHAPE From ESRI	Description Feature Geometry Domain Coordinates defining the features
STRUCCLASS From King County	Description Structure Class Domain 1 - Simple structure; usually single lane; no ramps 2 - Complex elevated structure; multilane or with ramps
FEATURE_ID No Source Noted	Description Not Found Domain Not Found
DATASOURCE No Source Noted	Description Not Found Domain Not Found
EDITED From King County	Description Edited Status Domain -9 - Not edited; raw data location and definition only 1 - Edited and modified against most current imagery
Shape.STArea() From SQL Server	Description Returns the area of a geometry instance in square units, based on the spatial reference identifier (SRID) of the geometry. Domain Double
Shape.STLength() From SQL Server	Description Returns the total length of the elements in a geometry instance. Domain Double

Maintained by	KCGIS Center
Primary	KCGIS Center giscenter@kingcounty.gov

License	Terms of use and copyright

Links How to use in ArcGIS Pro
Sharing Status	Not Public

Provides areal extent to elevated structures as well as edge line definition.

One use is in ortho rectification for defining areas that may need to be inspected for accurate rectification.

Polygons defining elevated transportation structures: bridges, overpasses, highway ramps.

Primarily elevated roadway features, but also includes railway structures.

Maintained by	KCGIS Center
Primary	KCGIS Center giscenter@kingcounty.gov

License	Terms of use and copyright

8/1/2010	During review of 2010 iTen orthophotography 7500x7500 tiles, additional features were added. Existing features were not modified.
1/1/2009	Various source data were collected that defined bridges, elevated structures, etc. If data was point data, a generic buffer feature was created. All features were appended and dissolved to remove overlaps. To assist in definition of what portion of the structure was elevated, a supporting layer was created from the last return and bare earth lidar data.
Update 3	Using the 2009 Pictometry imagery, each of the compiled features was evaluated and modified to align with the imagery.